Select the correct statement (s) from the following (a) Displacement current comes into play in ...

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Select the correct statement (s) from the following
(a) Displacement current comes into play in a region electric field is changing with time.
(b) Displacement current \( I_{D}=\varepsilon_{0} \frac{\partial \phi_{E}}{\phi t} \).
(c) In case of a steady electric flux linked with a region the displacement current is minimum.
(d) \( I_{\mathrm{rms}}=\frac{2 \varepsilon_{0} E}{t} \)
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